Padlock



G. W.:ALDEEN 2,148,226

PADLOCK Feb. 21; 1939.

Patented Feb. 21, 1939 UNITED STATES PATENT OFFICE PADLOCK ApplicationAugust '7, 1931, Serial No. 555,660

22 Claims.

The invention relates generally to padlocks and more particularly to apadlock which may be opened by a permutation mechanism.

The general object of the invention is to provide a new and improvedpadlock of this type in which the combination is destroyed by the act oflocking.

Another object is to provide a padlock of this type in which movement ofthe shackle to its closed position causes the combination to bedestroyed and the shackle to be locked in such position.

A further object is to provide a padlock of this character which, inaddition to having a permutation mechanism, has a key-operated mechanismoperable only when the permutation mechanism is set at a predeterminedcombination, and in which said combination is not affected by the meansfor destroying the combination at which the padlock may be opened by thepermutation mechanism alone.

Still another object is to provide a new and improved padlock of thistype in which the permutation mechanism may be set by means responsiveto the sense of touch as well as by visible means.

Other objects and advantages will become apparent from the followingdescription taken in connection with the accompanying drawing, in which:

Figure l is a face view of a padlock embodying the features of theinvention.

Fig. 2 is a view of the padlock with the cover 7 plate removed and withthe mechanism therein in its locked position.

Fig. 3 is a view similar to Fig. 2 but showing the position of themechanism when the shackle is being inserted.

Fig. 4. is aview similar to Fig. 2 but showing the mechanism whenoperated by a key.

Fig. 5 is a sectional view taken substantially along the line 5-5 ofFig. 1.

Fig. 6 is a view showing the means for operating the permutationmechanism, which is responsive to the sense of touch.

Fig. 7 is a fragmentary sectional view taken substantially on the line1-1 of Fig. 2.

The present invention provides a padlock having two selectively operablemechanisms by which it may be opened. One of said mechanisms ispermutation-operated and includes a plurality of notched disks which,when alined, permit a bolt locking the shackle of the padlock to releasesaid shackle. On moving the shackle back into its closed position, thebolt is automatically thrown into engagement therewith, and the!alinement of,the disks is destroyed so that the shackle can not again bereleased without resetting the permutation mechanism.

The other mechanism is key-operated, but before operation thereof thepermutation disks must first be set to aline a different set of notches.When the shackle has been released by means of the key and it is desiredto close it again, the means for disalining the permutation 10 disks isrendered ineffective.

The invention also includes, in addition to the visible means forsetting the permutation disks, 2. means for setting said disks throughthe sense of touch. A padlock having such means 15 may thus be easilyopened in the dark or by a blind person.

The padlock is generally of the type shown in my copending applicationSerial No. 484,071, filed September 24, 1930 and, as shown in the 20drawing, comprises a casing having a side Wall l0 substantiallycylindrical in form and having an integral rear wall II and a frontplate ll secured to the side wall [0. Inserted through apertures in theside wall In is a shackle I2 25 having one end l3 releasably securedwithin the casing and the other end l4 slidably secured therein. The endl3 when released is adapted to be withdrawn from the casing while theend [4 slides therein. When the end I3 is so With- 30 drawn the entireshackle may be rotated about the axis of the end l4.

To look the end l3 of the shackle within the casing, a bolt l5 (see Fig.2) is provided which has a cavity IS in its side forming a lug I1 35adapted to engage a notch cut in the side of the end 13 of the shackle.The bolt is pivotally supported within the casing as by a pin I8.

Pivotal movement of the bolt to disengage it from the shackle iscontrolled by a permutation mechanism of the type shown in saidcopending application and comprising a plurality of disks 2|], in thepresent instance three disks, rotatably mounted on a spindle 2lcentrally of the casing and pressed forwardly in the casing by a springl9 bearing against a plate I9 Each disk 20 has a notch 22 out in itsedge which when alined with the notches in the other disks, permitsengagement therewith of a tongue 23 formed on the inner side of the boltI 5 near its free end. When the notches 22 are so alined, outwardmovement of the end 13 of the shackle cams the bolt out of engagementtherewith and into engamement With he notches 22.

Means is provided for yieldably holding the bolt in any position towhich it is moved to prevent it from jarring out of position. This meanscomprises, in the present instance, a pair of balls 24 positioned in anaperture in the free end of the bolt and spring-pressed outwardlyrespectively against the rear wall II and the front plate ll of thecasing. Thus, the pressure of the balls 24 against the rear wall and thefront plate yieldably retain the bolt in any position to which it ismoved.

The disks 2!! are set by means of a knob 25 mounted on the front of thecasing and having a shank 26 to which the front disk 20 is rigidlysecured. The other two disks are rotated by means of lugs formed ontheir faces and abutting against corresponding lugs formed on the frontdisk and on each other. The shank 26 also carries a graduated dial 2'!which cooperates with a fixed mark on a face plate 28 secured over thefront plate ll of the casing.

The padlock, as in the case of. the padlock shown in my copendingapplication, also includes a second mechanism for opening the lock,which mechanism is key-operated and is mounted rearwardly of the platel9 in the casing. As illustrated in the drawing, the key-operatedmechanism comprises a pair of plates adapted to be cammed by rotation ofa key. One of said plates, indicated at 30, is adapted to be moved atright angles to the second plate 3| and is provided with a fence whichmust be moved to a predetermined position before the second plate 3| canbe moved. The second plate is provided with a cam slot 32 in which thepivot pin l8 of the bolt is mounted, and on movement of the plate 3|,the bolt is moved circumferentially around the casing and out ofengagement with the shackle, as shown in Fig. 4.

As a means to prevent the key-operated mechanism from being picked, someof the permutation disks 2|] are provided with a second set of notcheswhich must be alined in a predetermined position before the first plate30 can be moved.

'In the present instance, the two rear disks 20 are provided with suchnotches, indicated at 33, in Fig. 4. Cooperating with the notches is afinger 34 carried by the first plate 30. Thus, the first plate can notbe moved until the notches 33 are positioned opposite the finger 34, andthe key-operated mechanism is rendered inoperable unless the notches areso positioned.

As mentioned above, a feature of the present invention is to providemeans for automatically throwing the bolt out of engagement with thepermutation disks and into engagement with the shackle when the end I 3thereof is reinserted into the casing. Thus the shackle will beautomatically locked when inserted into the casing. Said means, in thepresent instance, is actuated by the slidable end l4 of the shackle oninward movement thereof and comprises a lever 40 pivotally supportedpreferably on the spindle 2| for the permutation disks between the plateIt and the plates of the key-operated mechanism. One end of the lever 40carries a lug 4| adapted to be struck by the slidable end l4 of theshackle on inward movement thereof and to be swung thereby. The otherend-of the lever extends toward the bolt l5 and has a lug 42 adapted toabut against a finger 43 extending from] the inner side of the bolt l5and spaced from the pivot I8. Thus, on inward movement of the shackle,the slidable end l4 swings the lever 40 which, in turn, swings the boltout of engagement with the permutation disks and into engagement withthe end l3 of the shackle.

When the end [3 of the shackle is withdrawn from the casing, it cams thebolt out of engagement therewith and into engagement with the disks. Atthe same time, the bolt swings the lever 46 to such position that it maybe actuated by the slidable end M of the shackle, and the bolt isyieldably retained in such position by the balls 24 until it is moved.back into engagement with the shackle by the lever.

When the bolt is moved circumferentially by the key-operated mechanismto release the shackle, as shown in Fig. 4, the lever 40 remainsstationary and is ineffective, the cam slot 32 causing the bolt to moveback into engagement with the shackle.

In schools where a great many padlocks of the type shown herein areused, it has been found that a student when closing his padlock willmerely give the dial a fraction of a turn after the shackle is inserted,so that when he next desires to open it he need only turn the dial backan equal amount. In turning the dial but a fraction of a turn, the frontpermutation disk only is disalined so that the bolt is actually looked,but the lock may be easily picked.

To prevent such practice and to make sure that the bolt is securelylocked when the shackle is inserted, the present invention also has thefeature of destroying the setting of the permutation mechanism in such amanner that all the permutation disks must be reset before the lock maybe opened. To attain this result, it will be evident that, if only therear permutation disk be disalined, then all the disks must be reset,since the rear disk cannot be reset without rotating both of the otherdisks.

As shown herein, the means for destroying the setting of the disks actsnot only on the rear disk but also on the middle disk. Said means is ofsuch a character that it will throw said two disks out of alinement byvariable amounts, depending upon how easily they may be rotated and uponthe particular manner of movement of the shackle on being inserted inthe casing. Thus, the amount of disalinement cannot accurately bedetermined. Said means is resilient in character and is constructed tostore up energy on inward movement of the shackle, and is automaticallyreleasable to destroy the setting of the permutation mechanism when thebolt is moved to its locking position by the lever 40, said lever thusacting as a trigger for said means.

This means comprises, in the present instance, a plate 50 looselycarried on the slidable end I4 of the shackle as by a headed screw 5|extending through an elongated aperture in the plate 50 and threadedinto the end of the shackle. The plate 50 extends toward the permutaiondisks and its edge is adapted to engage a third set of notches 52 (seeFig. 3) cut in the rear and middle disks, which are alined when thenotches 22, to receive the bolt, are alined. On outward movement of theshackle, the plate 50 is carried along therewith and slides over theedges of the disks, the latter being held against movement by the boltwhich has been cammed out of engagement with the shackle and intoengagement with the disks.

On inward movement of the shackle, the edge of the plate 50 engages thenotches 52 in the rear and middle disks. Since the plate 50 is looselymounted on the slidable end I4 of the shackle, it may pivot relativethereto to permit the edge of the plate to remain in the notches 52, thedisks being held against rotation by the bolt. When the slidable end I4of the shackle reaches the point where it strikes the lug M on the lever40, the latter will swing the bolt out of engagement with the disks.

Means is provided to snap the plate 50, at this point, back into itsnormal position on the shackle, as shown in Fig. 2, and to rotate therear and middle disks by such movement. As illustrated, said meanscomprises a resiliently mounted member 53 having one end bent to fitover the edge of the plate 50 and its other end pivotally supported inthe corner formed by the side wall III of the casing and a plate 54fixedly supported in the casing to guide the slidable end I4 of theshackle. A spring 55 is interposed between the member 53 and theadjacent side wall I causing the member 53 to bear against plate 50 andtending to prevent the latter from pivoting relative to the shackle.

Since the plate 50 rotates the rear and middle disks through itssnapping action due to the spring 55, how far the disks will rotateafter the plate 50 moves out of contact therewith will depend on thefrictional resistance to such rotation. The action of the plate 50 mayalso be somewhat modified by the manner of inward movement of theshackle. Thus, if the shackle is given a sharp, quick inward movement,the disks will be rotated farther. In view of these factors, it isevident that the disks may be rotated in variable amounts.

Since the bolt when in engagement with the disks prevents the disaliningmeans from acting, and since the lever 40 moves the bolt out ofengagement with the disks and thus releases the disalining means, thelever 40 constitutes a trigger for said means, the lever 40 being movedby inward movement of the shackle.

Another feature of the invention is to prevent inward movement of theshackle except when the releasable end I3 enters its aperture in thecasing, the purpose being to prevent throwing of the bolt and destroyingthe setting of the permutation disks, if it were attempted to move theslidable end I4 inwardly when the releasable end I3 is swung away fromthe casing. In the present instance, this feature is attained byproviding means on the slidable end I4 preventing inward movementthereof except when it is rotated so that the releasable end I3 isalined with its aperture in the casing. Said means preferably comprisesa pin 60 (see Fig. 7) extending radially from the side of the slidableend I4 and adapted to pass through a notch 6| cut in the fixed plate 54supporting the slidable end I4. If the shackle is not properlypositioned so that the releasable end I3 will enter its aperture in" thecasing, the pin 50 strikes the outer face of the fixed plate 54 toprevent inward movement of the shackle.

When the lock is opened by the key-operated mechanism, on inwardmovement of the shackle, the plate 50 is inefiective to disaline thepermutation disks since the disks are held against rotation by thefinger 34 of the key-operated mechanism. Also, since the disks are setin a different position for operation of the key-operated mechanism thanfor the permutation mechanism, the notches 52, into which the plate 50fits, are not alined, so that the plate 50 merely slides along the edgesof the disks without rotating them.

As mentioned above, the invention also includes, in addition to thevisible means for setting the permutation disks, a means for settingsaid disks through the sense of touch. To this end, a disk I0 (see Figs.5 and 6), serving as a counter, is rigidly secured on the shank 26 ofthe knob 25 for rotation therewith, and is positioned between the frontplate II and the dial 21. A plurality of notches II are out in theperiphery of the disk Ill and one of them, indicated at I2, is deeperthan the others.

The notches are adapted to receive a manually movable finger I3 formedon a member slidably supported in a slot in the front plate II by a pairof ears I4 resting on said front plate. The outer end of the member 15extends through an aperture in the side wall I0 of the casing so that itmay be pressed inwardly by the thumb or finger when the lock is held inthe hand. By pressing inwardly on the member I5 as the disk III isrotated, the position of the notches II may be detected and the deepernotch I2 may be distinguished from the others.

The deeper notch I2 is so positioned on the disk I0 that it is inposition to receive the finger I3 when the zero mark on the dial 21,which is also rotated with the knob 25, is at the fixed mark on the faceplate 28. Thus, the notches may be counted from the deeper notch throughthe sense of touch in a similar manner to setting the dial by the marksthereon.

In the operation of the lock, when it is desired to open it by thepermutation mechanism, the notches 22 in the disks are alined byrotating the knob 25. When the disks are so alined, the shackle may bepulled outwardly, the releasable end I3 camming the bolt I5 out ofengagement with the shackle and into engagement with the notches 22.Such movement of the bolt swings the lever 40 to a position where it maybe actuated by the shackle on inward movement thereof. When thereleasable end I3 of the shackle has been withdrawn from the easing, theshackle may be turned about the axis of the slidable end I4, but inwardmovement thereof is prevented by the pin 60 unless the releasable end I3is alined with its aperture in the casing. During the outward movementof the shackle, the plate 50, carried by the slidable end I4, wipesalong the edges of the rear and middle permutation disks past thenotches 52 therein, the disks being held against rotation by the bolt.

To close the lock, the shackle is turned so that its releasable end I3is alined with the aperture in the casing and the pin 60 is alined withthe notch 6| in the fixed plate 54 supporting the shackle. The shacklemay then be pushed inwardly of the casing, the plate 50 engaging thenotches 52 in the disks during such movement. When the slidable end I4strikes the lug M on the lever 49, it pivots the lever, which movementswings the bolt out of engagement with the permutation disks and intoengagement with the releasable end I3 of the shackle. The plate 50 hasmeanwhile pivoted on the slidable end I4 due to its engagement withnotches 52 in the disks, so that as soon as the bolt releases the disks,the action of the spring 55 and the member 53 on the plate 5|] causesthe latter to rotate the disks out of alinement.

Since the rear and middle disks are the ones so disalined, thepermutation mechanism must be completely reset before the lock can againbe opened by that means.

If it is desired to open the lock by the keyoperated mechanism, the rearand middle disks of the permutation mechanism are set so that.

the notches 33 are alined to receive the finger 34 on the first plate30. On rotation of the key, the first plate 30 is cammed so that thefinger 34 enters the notches 33 and so that the fence carried by thefirst plate permits movement of the second plate 3 l. The key then movesthe second plate so that its cam slot 32 moves the bolt I5circumferentiallyout of engagement with the releasable end I3 of theshackle permitting it to be withdrawn. Such movement of the bolt is awayfrom the lever 40, so that the lever will not be actuated when theshackle is later moved inwardly.

When the shackle is again moved inwardly to close the lock, the plate 50merely wipes over the edges of the disks since the notches 52 are notalined, and since the disks are held against rotation by the finger 34.The bolt [5 is moved back into engagement with the shackle by reverserotation of the key.

If it is desired to operate the permutation mechanism in the dark whenthe marks on the dial 2'! cannot be seen, the sliding member may bepressed so that its finger 13 engages the notches in the disk 10. Thepermutation disks may then be set to the required positions by countingthe number of notches from the deeper notch 12, as indicated through thesliding member 15, as the knob 25 is rotated.

From the above description, it will be apparent that I have provided apadlock in which the setting of the permutation mechanism will bedestroyed by the act of looking so that the mechanism will have to becompletely reset before it roan again be opened. But the means for sodestroying the setting is rendered inoperative to destroy the settingwhich cooperates with the key-operated mechanism. The lock herein shownis also provided with means which prevents destroying the setting unlessthe shackle is in a proper position to be locked. It is also evidentthat the lock may be operated through the sense of touch as well as bysight.

I.claim as my invention:

1. A padlock comprising, in combination, a casing, a shackle having oneend slidably secured in said casing, a bolt for locking the other end ofsaid shackle in said casing, a permutation mechanism in said casingcomprising a pluralty of notched disks adapted when alined to permit thebolt to be swung to release the shackle, a lever adapted to be swung bymovement of said shackle for moving said bolt to its locking position,and resilient means carried by said shackle and operable with a snapaction on movement of the shackle to disaline said disks when the boltis moved to its locked position.

2. A padlock comprising, in combination, a casing, a shackle having itsends extending into the casing, one end being removable therefrom, abolt for locking said removable end in the casing, a permutationmechanism comprising a plurality of notched disks adapted when alined topermit the bolt to be swung to release said removable end, a lever formoving said bolt to its locking position actuated by the other. end ofthe shackle, and a resiliently mounted member actuated by said other endof the shackle for rotating said disks when the bolt is moved to itslocked position.

3. A padlock comprising, in combination, a casing, a shackle, a bolt forlocking said shackle, a permutation mechanism comprising a plurality ofnotched disks adapted when alined to permit said bolt to be moved out oflocking position, and constituting an abutment preventing movement ofsaid bolt when disalined, a device actuated by said shackle for movingsaid bolt to its locking position, and resilient means operated byclosing movement of said shackle on closing movement and having a snapaction for destroying the alinement of said disks when said bolt ismoved to its locking position. I

4. A padlock comprising, in combination, a casing, a shackle, a bolt forlocking said shackle, a permutation mechanism adapted when set at apredetermined combination to permit said bolt to be moved out of lockingposition, and a device constructed for storing up energy connected tosaid shackle and operated by inward movement thereof and automaticallyreleasable by movement of the bolt to its locking position to destroythe setting of said permutation mecha- IllSIl'l.

5. In a padlock, the combination of a shackle, a permutation mechanismcomprising a plurality of notched disks adapted when alined to permitthe shackle to be opened, and resilient means moved into contact withsaid disks on inward movement of the shackle operable on said inwardmovement to store up energy and releasable to disaline one or more ofsaid disks under the control of said inward movement.

6. In a padlock, the combination of a shackle, a permutation mechanismcomprising a plurality of notched disks adapted when alined to permitthe shackle to be opened, and means carried by the shackle and operablefor disalining one or more of said disks, the inward movement of theshackle storing up energy in said means and controlling the releasethereof.

7. In a padlock, the combination of a shackle, a bolt for locking saidshackle, a permutation mechanism comprising a plurality of notched disksadapted when alined to permit the bolt to be moved out of engagementwith said shackle and into engagement with said disks, a plate looselycarried by said shackle and adapted to engage the edges of said disks onmovement of said shackle, and resilient means bearing against said plateand arranged to cause said plate to rotate said disks on inward movementof the shackle and following disengaging movement of the bolt from saiddisks.

8. In a padlock, the combination of a shackle, a bolt for locking saidshackle, a permutation mechanism comprising a plurality of notched disksadapted when alined to permit the bolt to be moved out of engagementwith said shackle and into engagement with said disks, a plate pivotallysupported on said shackle for movement about an axis transverse to saidshackle, said plate being adapted to engage the edges of said disks onmovement of said shackle, and a re siliently mounted member bearingagainst said plate and arranged to cause said plate to swing about itspivot to rotate said disks on inward movement of the shackle andfollowing disengaging movement of the bolt from said disks.

9. In a padlock, the combination of a shackle, a bolt for locking saidshackle, a permutation mechanism comprising a plurality of notched disksadapted when alined to permit the bolt to be moved out of engagementwith said shackle and into engagement with said disks, a plate having anelongated hole fitting over one end of said shackle, one edge of saidplate being adapted to engage the edges of said disks on movement ofsaid shackle, and a resiliently mounted member bearing against theopposite edge of said plate and arranged to cause said plate to rotate.said disks on inward, movement. of the shackle and following disengagingmovement of the bolt from said disks.

- .10.. In a padlock, the combination of a shackle, a bolt for lockingsaid shackle, a permutation mechanism comprising a plurality ofrotatable disks having notches in their respective peripheries adaptedwhen alined to permit the bolt to be moved out of engagement with saidshackle and into engagement with said notches, means for rotating one ofsaid disks, and cooperating abutments formed on the disks whereby theother disks maybe rotated? by said one disk, and means operated bymovement of said shackle and operable with a snap action for rotatingthe disk farthest from said one disk on inward movement of the shackleand following disengaging movement of the bolt from said disks.

11. In a padlock, the combination of a shackle, a bolt for locking saidshackle, a permutation mechanism comprising a plurality of rotatabledisks having a set of notches adapted when alined to permit the bolt tobe moved out of engagement with said shackle and into engagement withsaid notches, some of said disks respectively having other notches, anda plate carried by said shackle and adapted to enter edgewise into saidother notches on movement of said shackle for rotating said disks whenthe bolt is disengaged therefrom.

12. In a padlock, the combination of a shackle, a bolt for locking saidshackle, a permutation mechanism comprising a plurality of disks havingone set of notches which when alined permit the bolt to be swung out ofengagement with said shackle and into engagement with said notches, saiddisks having a second set of notches, means coacting with said secondset of notches for disalining said disks when the bolt is disengagedtherefrom, and a key-operated mechanism for disengaging the bolt fromsaid shackle including a finger, said disks having a third set ofnotches adapted to receive said finger to permit operation of saidkey-operated mechanism, said finger preventing disalining of said disksby said disalining means.

13. A padlock comprising, in combination, a casing, a shackle having oneend slidably secured in said casing, the other end of said shackle beingwithdrawable therefrom, a bolt for locking said other end in the casing,a permutation mechanism adapted when set to permit said bolt to releasesaid other end of the shackle, a device mounted in said casing forswinging said bolt into engagement with said other end of the shackleand actuated by inward movement of said shackle, and means to preventinward movement of said slidable end except when said'other end enterssaid casing.

14. In a padlock, the combination of a casing, a shackle, a bolt movableinto and out of engagement with said shackle, means mounted in said boltand having a frictional engagement with said casing for retaining saidbolt in any position to which it is moved, cam means formed on saidshackle for forcing said bolt out of engagement therewith when theshackle is pulled outwardly of the casing, and means operable by theinward movement of said shackle for moving said bolt into engagementtherewith.

15. In a padlock, the combination of a casing, a shackle having one endpermanently secured within said casing, a pivoted bolt adapted to beswung into and out of engagement with the other end of said shackle andhaving a finger formed thereon, a permutation device adapted when set ata predetermined combination to permit said bolt to be swung out ofengagement with said other end of the shackle, cam means formed on saidother end adapted to cam said bolt out of engagement therewith onoutward movement thereof, and a lever having one end in engagement withsaid one end of said shackle and its other end in engagement with saidfinger and adapted to swing said bolt into engagement with said shackleon inward movement thereof.

16. In a padlock, the combination of a casing, a shackle, a bolt movableinto and out of engagement with said shackle, a permutation mechanismcomprising a spindle and a plurality of notched disks rotatably mountedthereon and adapted when alined to permit said bolt to be moved out ofengagement with said shackle, and a lever pivotally supported on saidspindle and actuated by inward movement of said shackle to swing thebolt into engagement therewith.

17. In a padlock, the combination of a shackle, a permutation devicecomprising a plurality of disks adapted when alined to permit theshackle to be unlocked, a device cooperating with one of said disks forstoring up energy on movement of the shackle and adapted when releasedto disaline one of said disks, and a trigger operated by inward movementof the shackle for releasing said device.

18. In a padlock, the combination of a shackle, a permutation devicecomprising a spindle and a plurality of disks rotatably mounted on thespindle and adapted when alined to permit the shackle to be unlocked, adevice cooperating with one of said disks for storing up energy onmovement of the shackle and adapted when released to disaline one ofsaid disks, and a trigger pivotally mounted on said spindle and operatedby inward movement of the shackle for releasing said device.

19. In a permutation lock, the combination with a tumbler provided witha notch, a bolt retractable into said notch and a shackle en gageable bysaid bolt pending its retraction, of a tumbler disarranging pawl, aspring acting on said pawl in a direction to throw said tumbler notchout of registry with said bolt, and means whereby said spring istensioned by the movement of said shackle.

20. In a lock, the combination with a shackle and a bolt provided withmutually interacting parts adapted to restrain the shackle in lockedposition pending withdrawal of the bolt, a tumbler controllingwithdrawal of the bolt, said tumbler and bolt having interacting partspreventing movement of said tumbler when said bolt is withdrawn, saidbolt when in withdrawn position being adapted to receive said shacklefor subsequent locking engagement, and yielding friction means forrestraining the bolt against movement from its locked position or fromits withdrawn, shackle receiving position, whereby to permit readyreengagement of the shackle with said bolt.

21. In a permutation look, a lock casing, a shackle mounted in thecasing having one end adapted to be released from engagement therein, alocking pawl mounted in the casing and engageable with said releasableend of the shackle, tumbler mechanism including a series of disksadapted to be adjusted in a predetermined combination which permits saidpawl to release the end of the shackle, and means engageable by theother end of the shackle as the releasable end re-enters the casing forpositively dis-arranging the tumbler disks.

22. In a permutation padlock, a casing, a shackle mounted in the casinghaving one end adapted to be releasedfrom engagement therein, a lockingpawl mounted in the casing and engageable with said releasable end ofthe shackle, tumbler mechanism arranged for normally maintaining saidpawl in locking engagement with said end of the shackle, said mechanismincluding a series of disks each having a peripheral notch adapted to beadjusted in registration for receiving an inter-engaging element of saidpawl and thereby permit moving the pawl out of locking engagement withsaid end of the shackle, means including a part adapted to be' engagedand actuated by the other end. of the shackle as the releasable endre-enters the casing for shifting said inter-engaging element of thepawl out of the notches of the tumblers and for shifting the pawl intolocking engagement with the releasable end of the shackle, and meansacting for disarranglng the tumbler disks.

GEDOR W. ALDEEN.

CERTIFICATE OF CORRECTION.

Petent No. 2,1L s,226. February 21, 1939.

GEDOR w. ALDEEN.

It is he'reby certified that erroI' appears in the, printedspecification of the above numbered patent requiring correctionasfollcws: Page L1,, second column, lines jand claim 5,- strike out thewords "closing movement of and ineert the same after "by in line 1, sameclaim; and that the said Letters- Patent should be read with thiscorrection therein that the same may conform to the record of the caseinthe Patent Office.

Signed and sealed this 25th 1a of April, Am, 19 9.

Henry Van Arsclale (Seal) Acting Qommi'ssiener of Patents.

